Would you say... You have arrived at a compromise? Ba-dum-tshh!
I am not saying that the "original" definition of "concessions on both sides" is strange at all though — merely that this was the original (first) meaning of the word, but that it is today used for both indicating a successful idea that meets multiple goals when they are re-evaluated by their spirit, and a set of concessions that meet some but not all of the original goals or their spirit.
It's really strange how some people unconsciously try to push the idea that the only possible and acceptable feedback comes from those that only reinforce your own personal opinions. Not even Jesus was this sure about himself.